Yu, Qian-Qian
Guan, Ge
Zhang, Nian-Kai
Zhang, Xiao-Wen
Jiang, Yan
Lian, Yuan-Yuan
Liu, Ting-Ting
Jiang, Xiao-Dan
Funding for this research was provided by:
Shandong Procincial Natural Science Foundation, China (ZR2016HB66)
Article History
Received: 23 May 2018
Accepted: 25 July 2018
First Online: 4 August 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study was approved by the Institutional Review Board of the Affiliated Hospital of Qingdao University, Shandong, China.
: This was a retrospective review and thus, informed consent was not required by our human ethics board.